laguardia still closed today because of sandy. you can see from these pictures the airport looks like a lake more than an airport. not clear when it will reopen. other airports at the northeast traffic slowly getting back to normal but there are still major flight delays. >>> from the south bay to san francisco, more and more cities are banning paper an plastic grocery bags. but on the consumerwatch julie watts is here with a warning about their reusable replacements. >> reporter: well, simply put, your reusable grocery bags may be as dirt as your underwear. that's the finding of a recent study out of loma linda university. researchers tested reusable bags and found the same kind of bacteria as is typical in dirty underwear. >> overall we found that 10% of the bags had e. coli, about 50% around there had coliforms and almost all the bags had some kind of bacteria. i don't think anybody wants fecal bacteria in their groceries bags. >> reporter: many folks store the bags in the back of the cars. a warm dark place. the perfect breedi